Slope covering and method of constructing the same

Abstract

To provide a slope covering body capable of suppressing generation of weed between plastering blocks.SOLUTION: A slope covering body 10 is formed of: paving sand 1 paved on a slope surface A; a weed-proof sheet 2 installed on the paving sand 1; and plastering blocks 3 covering the weed-proof sheet 2. The paving sand 1 is preferably made from concrete recycled sand.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a slope covering and a construction method thereof.

Background Art

[0002] In order to protect slopes from erosion, collapse, etc., mainly when the slope of the slope is 45 degrees or less, a construction method of stretching tension blocks to cover the slope is widely adopted. The tension blocks are connected adjacent to each other vertically and horizontally by engaging the concave and convex portions formed on their side surfaces, and are stretched on the slope (see, for example, the background art sections of Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional slope covering formed by stretching tension blocks, the gaps between the connected tension blocks are small, and although it has a structure where weeds are unlikely to grow, some gaps occur, so over time, weeds may grow from those gaps.

[0005] When weeds grow between the tension blocks like this, not only is the aesthetics not good, but due to factors such as root lifting during weeding and pushing up due to the hypertrophy of weed roots, distortion may occur in the connection part of the tension blocks, and there is a risk of quality problems.

[0006] In view of the above points, an object of the present invention is to provide a slope covering capable of suppressing the growth of weeds between tension blocks and a construction method thereof.

Means for Solving the Problems

[0007] The slope covering of the present invention is characterized by being formed from a layer of sand laid on the slope, a weed control sheet installed on the sand, and concrete blocks stretched over the weed control sheet.

[0008] According to the slope covering of the present invention, since a weed control sheet is installed beneath the concrete blocks, it is possible to suppress the growth of weeds from the gaps between the concrete blocks. Furthermore, since sand is laid beneath the weed control sheet, water that passes through the weed control sheet is retained by the sand, making it possible to further suppress the growth of weeds.

[0009] In the slope covering of the present invention, the bedding sand is preferably made of recycled concrete sand.

[0010] In this case, since recycled concrete sand is derived from concrete and is strongly alkaline, it can effectively suppress weed growth.

[0011] The present invention provides a method for constructing a slope covering, comprising the steps of: laying sand on the slope; shaping the laid sand; installing a weed control sheet on the shaped sand; and laying concrete blocks on the weed control sheet.

[0012] The method for constructing a slope covering according to the present invention makes it possible to easily construct the slope covering according to the present invention. It is preferable to include a step of shaping the laid slope and then placing bedding sand on the shaped slope. This makes it possible to reduce the amount of bedding sand used. [Brief explanation of the drawing]

[0013] [Figure 1] A schematic partial side view showing a slope covering according to an embodiment of the present invention. [Figure 2] A schematic partial perspective view of the slope covering, with some members omitted, as seen from the direction of arrow A in Figure 1. [Modes for carrying out the invention]

[0014] A slope covering 10 according to an embodiment of the present invention will be described with reference to Figures 1 and 2. Note that Figures 1 and 2 are schematic diagrams illustrating this embodiment, and the dimensions are simplified.

[0015] The slope covering 10 is formed from a layer of sand 1 laid on the slope A, a weed control sheet 2 installed on top of the sand 1, and concrete blocks 3 stretched over the weed control sheet 2.

[0016] Slope A is an artificial slope created by cutting and filling, formed by excavation and embankment of natural ground in connection with road construction, residential land development, etc. Slope A is, for example, the slope (earthen embankment) for laying railway tracks. It is preferable that weeds and their seeds have been removed in advance from the cut and fill that make up Slope A.

[0017] The bedding sand 1 is laid on top of the shaped slope A. For example, bedding sand 1 consists of sand with an average particle size of 5 mm or less, laid to a thickness of 50 mm to 100 mm on slope A, shaped using a trowel or similar tool to ensure a flat surface. Any commercially available sand intended for bedding sand can be used as bedding sand 1.

[0018] Furthermore, it is preferable to use recycled concrete sand as the bedding sand 1. Recycled concrete sand is a recycled material obtained by crushing or disintegrating cement concrete waste, adjusting it to a predetermined particle size, and adding supplementary materials as needed. Since recycled concrete sand is derived from concrete and is strongly alkaline, it can effectively suppress the growth of weeds. In addition, because recycled concrete sand has an angular particle shape, it is less likely to be washed away even if it rains during laying. Moreover, since recycled concrete sand hardens when it contains moisture, it is less likely to be washed away even if it rains, and it can also suppress the spread of weed roots.

[0019] The weed control sheet 2 is installed on the shaped sand bedding 1. The weed control sheet 2 is a woven or non-woven fabric made of resin fibers such as polypropylene, polyethylene, polyester, etc., and has excellent properties such as light-shielding, water permeability, heat resistance, ultraviolet resistance, durability, etc. Any commercially available weed control sheet may be used as the weed control sheet 2. Note that the weed control sheet 2 may be one with special processing applied to the surface or the like, or one to which a weed control material or the like is added.

[0020] The weed control sheet 2 is installed with its ends overlapping so as to cover the surface of the sand bedding 1 without gaps. The weed control sheet 2 may be simply placed on the sand bedding 1 or may be fixed to the sand bedding 1 using an installation tool such as a pin. Also, the weed control sheet 2 may be fixed to each adjacent one with an adhesive such as tape in order to maintain the overlap of the ends.

[0021] The tension blocks 3 are stretched over the weed control sheet 2. The tension blocks 3 are roughly flat blocks made of precast concrete. Any commercially available tension blocks may be used as the tension blocks 3. It is preferable to install the weed control sheet 2 at an appropriate position so that the ends of the weed control sheet 2 do not lie under the gaps between the tension blocks 3. The lower surface of the tension block 3 is flat, and the weed control sheet 2 does not move even if the tension block 3 is placed on the weed control sheet 2.

[0022] Here, the upper surface of the tension block 3 is recessed in a rectangular shape, and has semi-arc-shaped recesses 3a, 3b on the side surfaces (here, the upper side surface and the left side surface), and semi-arc-shaped protrusions 3c, 3d on the side surfaces (here, the lower side surface and the right side surface) facing these side surfaces. Such tension blocks 3 are sequentially stretched from the left side to the right side by fitting the protrusion 3d on the right side surface into the recess 3b on the left side surface, and further stretched from the lower side to the upper side by fitting the protrusion 3a on the lower side surface into the recess 3c on the upper side surface.

[0023] In this way, since the tension blocks 3 are connected by the engagement of the concave portions 3a and 3b and the convex portions 3c and 3d on the side surfaces, construction such as placing concrete between the tension blocks 3 is not required. Furthermore, it is also possible to move somewhat following a partial settlement of the slope surface A. Note that the connection structure of the tension blocks 3 is not limited to the one described above. For example, it may be a structure in which the concave portion is fitted from above the convex portion, or conversely, a structure in which the convex portion is fitted from above the concave portion. Furthermore, it may not be a fitting structure, but may be a structure in which they are simply placed.

[0024] Note that the tension blocks 3 are not limited to those having the above-described structure. For example, the tension blocks 3 may be fixed to the slope surface A using bolts, pins, or the like. Also, the tension blocks 3 may be connected to each other using a fastening tool or the like. Furthermore, the tension blocks 3 may have a structure for draining water or the like.

[0025] Next, a method for constructing the slope covering 10 according to an embodiment of the present invention will be described.

[0026] In this method for constructing the slope covering 10, first, a step of shaping the slope surface A of the cut soil or fill is performed. Next, a step of laying the sand 1 on the shaped slope surface A and shaping the laid sand 1 is performed. Note that by shaping the upper surface of the slope surface A on which the sand 1 is laid, it is possible to reduce the amount of sand 1 used. Next, a step of installing the weed prevention sheet 2 on the shaped sand 1 is performed. Next, a step of stretching the tension blocks 3 over the weed prevention sheet 2 is performed. Thereby, the slope covering 10 is completed.

[0027] According to the slope covering 10 described above, since the weed prevention sheet 2 is installed under the tension blocks 3, it is possible to suppress the growth of weeds from the gaps between the tension blocks 3. Furthermore, for the weed prevention sheet 2 exposed from between the tension blocks 3, since the time when the ultraviolet rays are blocked by the tension blocks 3 is long, the weed prevention effect lasts for a long period compared to the normal use state.

[0028] Furthermore, since the bedding sand 1 is laid beneath the weed control sheet 2, the water that passes through the weed control sheet 2 is retained by the bedding sand 1, which further suppresses the growth of weeds.

[0029] It should be noted that the present invention is not limited to the slope covering 10 and its manufacturing method described in the embodiments described above, and can be modified as appropriate within the scope of the claims.

[0030] For example, a sheet-like material may be interposed between the sand cover 1 and the weed control sheet 2, or between the weed control sheet 2 and the concrete blocks 3. [Explanation of Symbols]

[0031] 1...Sand bedding, 2...Weed control sheet, 3...Plain blocks, 3a,3b...Recessed parts, 3c,3d...Convex parts, 10...Slope covering, A...Slope.

Claims

1. A slope covering characterized by being formed from a bedding sand made of recycled concrete sand laid on the slope, a weed control sheet installed with its edges overlapping so as to completely cover the surface of the bedding sand, and tension blocks stretched on top of the weed control sheet, which are connected by the interlocking of semicircular recesses and semicircular protrusions on their sides.

2. A method for constructing a slope covering according to Claim 1, The process involves laying a bedding layer made of recycled concrete sand on top of the slope, The process of shaping the laid sand, The process of installing a weed control sheet on top of the shaped sand, overlapping its edges so as to completely cover the surface of the sand without any gaps, A method for constructing a slope covering, characterized by comprising the step of laying down tension blocks on top of the weed control sheet, connecting them by interlocking semicircular recesses and semicircular protrusions on the sides.

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